1) To insert one's nuts into the mouth of another (of either gender), usually while they are sleeping. Can either be a situation of laughter or of excruciating pain, depending on whether the victim is a biter.

2) When after being brutally killed in Halo 2, your opponent squats repeatedly on you, imitating the act of dipping his balls on you. Rather humiliating, especially when there's more than one of them doing it.

3) A small bag of dried herbs, that magically makes tea when you add water and give it some time to steep.

4) The scrotum of a man who has had his testicles removed.

1) Devon teabagged his girlfriend Veronica, then for shits and giggles he teabagged his friend Barton. And Barton bit Devon's left testicle off and beat the shit out of him.

2) After I sniped five guys on a Multi-Flag CTF in Coagulation (including two in a Warthog) for a Kill Frenzy, two of them killed me with SMG fire and then simultaneously teabagged me.

3) I placed the teabag in the boiling water and gently stirred, five minutes later I had hot peppermint tea.

4) Jenna broked up with her boyfriend Jacob because when she saw his equipment, she noticed he had a teabag.